The patented AC Commander with Speed Management System Technology™ is the perfect engine upgrade for those who desire more speed steps than the usual 32. The AC Commander is capable of operating in 32 speed step mode for speed profile compatibility with existing engines. When desired, the AC Commander can be switched to operate with 100 speed steps. The low end speed control performance is noticeably improved in this mode of operation. Even AC motors can be set to “creep” down the rails!